Publicação
Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites
| Resumo: | Hydrological interactions between vegetation, soil, and topography are complex, and heterogeneous in semi-arid landscapes. This along with data scarcity poses challenges for large-scale modeling of vegetation-water interactions. Here, we exploit metrics derived from daily Meteosat data over Africa at ca. 5 km spatial resolution for ecohydrological analysis. Their spatial patterns are based on Fractional Vegetation Cover (FVC) time series and emphasize limiting conditions of the seasonal wet to dry transition: the minimum and maximum FVC of temporal record, the FVC decay rate and the FVC integral over the decay period. We investigate the relevance of these metrics for large scale ecohydrological studies by assessing their co-variation with soil moisture, and with topographic, soil, and vegetation factors. Consistent with our initial hypothesis, FVC minimum and maximum increase with soil moisture, while the FVC integral and decay rate peak at intermediate soil moisture. We find evidence for the relevance of topographic moisture variations in arid regions, which, counter-intuitively, is detectable in the maximum but not in the minimum FVC. We find no clear evidence for wide-spread occurrence of the “inverse texture effect” on FVC. The FVC integral over the decay period correlates with independent data sets of plant water storage capacity or rooting depth while correlations increase with aridity. In arid regions, the FVC decay rate decreases with canopy height and tree cover fraction as expected for ecosystems with a more conservative water-use strategy. Thus, our observation-based products have large potential for better understanding complex vegetation-water interactions from regional to continental scales. |
|---|---|
| Autores principais: | Küçük, Çağlar |
| Outros Autores: | Koirala, Sujan; Carvalhais, Nuno; Miralles, Diego G.; Reichstein, Markus; Jung, Martin |
| Assunto: | Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| _version_ | 1868413672307556352 |
|---|---|
| author | Küçük, Çağlar |
| author2 | Koirala, Sujan Carvalhais, Nuno Miralles, Diego G. Reichstein, Markus Jung, Martin |
| author2_role | author author author author author |
| author_facet | Küçük, Çağlar Koirala, Sujan Carvalhais, Nuno Miralles, Diego G. Reichstein, Markus Jung, Martin |
| author_role | author |
| contributor_name_str_mv | CENSE - Centro de Investigação em Ambiente e Sustentabilidade DCEA - Departamento de Ciências e Engenharia do Ambiente John Wiley and Sons Inc. RUN |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Küçük, Çağlar\"},{\"Person.name\":\"Koirala, Sujan\"},{\"Person.name\":\"Carvalhais, Nuno\"},{\"Person.name\":\"Miralles, Diego G.\"},{\"Person.name\":\"Reichstein, Markus\"},{\"Person.name\":\"Jung, Martin\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | CENSE - Centro de Investigação em Ambiente e Sustentabilidade DCEA - Departamento de Ciências e Engenharia do Ambiente John Wiley and Sons Inc. RUN |
| datacite.creators.creator.creatorName.fl_str_mv | Küçük, Çağlar Koirala, Sujan Carvalhais, Nuno Miralles, Diego G. Reichstein, Markus Jung, Martin |
| datacite.date.Accepted.fl_str_mv | 2022-03-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2022-10-05T22:16:00Z |
| datacite.date.embargoed.fl_str_mv | 2022-10-05T22:16:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| datacite.titles.title.fl_str_mv | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| dc.contributor.none.fl_str_mv | CENSE - Centro de Investigação em Ambiente e Sustentabilidade DCEA - Departamento de Ciências e Engenharia do Ambiente John Wiley and Sons Inc. RUN |
| dc.creator.none.fl_str_mv | Küçük, Çağlar Koirala, Sujan Carvalhais, Nuno Miralles, Diego G. Reichstein, Markus Jung, Martin |
| dc.date.Accepted.fl_str_mv | 2022-03-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2022-10-05T22:16:00Z |
| dc.date.embargoed.fl_str_mv | 2022-10-05T22:16:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10362/144486 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| dc.title.fl_str_mv | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Hydrological interactions between vegetation, soil, and topography are complex, and heterogeneous in semi-arid landscapes. This along with data scarcity poses challenges for large-scale modeling of vegetation-water interactions. Here, we exploit metrics derived from daily Meteosat data over Africa at ca. 5 km spatial resolution for ecohydrological analysis. Their spatial patterns are based on Fractional Vegetation Cover (FVC) time series and emphasize limiting conditions of the seasonal wet to dry transition: the minimum and maximum FVC of temporal record, the FVC decay rate and the FVC integral over the decay period. We investigate the relevance of these metrics for large scale ecohydrological studies by assessing their co-variation with soil moisture, and with topographic, soil, and vegetation factors. Consistent with our initial hypothesis, FVC minimum and maximum increase with soil moisture, while the FVC integral and decay rate peak at intermediate soil moisture. We find evidence for the relevance of topographic moisture variations in arid regions, which, counter-intuitively, is detectable in the maximum but not in the minimum FVC. We find no clear evidence for wide-spread occurrence of the “inverse texture effect” on FVC. The FVC integral over the decay period correlates with independent data sets of plant water storage capacity or rooting depth while correlations increase with aridity. In arid regions, the FVC decay rate decreases with canopy height and tree cover fraction as expected for ecosystems with a more conservative water-use strategy. Thus, our observation-based products have large potential for better understanding complex vegetation-water interactions from regional to continental scales. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://run.unl.pt/bitstreams/0548cd37-6791-405a-9b7a-059870f25d5a/download |
| funding.funder.alternateName_str_mv | EC |
| funding.funder.identifier_str_mv | http://doi.org/10.13039/501100008530 |
| funding.funder.name_str_mv | European Commission |
| funding.name_str_mv | H2020 |
| id | run_cd06d41efc06caa3d465572b8edeb09c |
| identifier.url.fl_str_mv | http://hdl.handle.net/10362/144486 |
| instacron_str | unl |
| institution | Universidade Nova de Lisboa |
| instname_str | Universidade Nova de Lisboa |
| language | eng |
| network_acronym_str | run |
| network_name_str | Repositório Institucional da UNL |
| oai_identifier_str | oai:run.unl.pt:10362/144486 |
| organization_str_mv | urn:organizationAcronym:unl |
| person_str_mv | Küçük, Çağlar Koirala, Sujan Carvalhais, Nuno Miralles, Diego G. Reichstein, Markus Jung, Martin |
| publishDate | 2022 |
| reponame_str | Repositório Institucional da UNL |
| repository_id_str | urn:repositoryAcronym:run |
| service_str_mv | urn:repositoryAcronym:run |
| spelling | engenHydrological interactions between vegetation, soil, and topography are complex, and heterogeneous in semi-arid landscapes. This along with data scarcity poses challenges for large-scale modeling of vegetation-water interactions. Here, we exploit metrics derived from daily Meteosat data over Africa at ca. 5 km spatial resolution for ecohydrological analysis. Their spatial patterns are based on Fractional Vegetation Cover (FVC) time series and emphasize limiting conditions of the seasonal wet to dry transition: the minimum and maximum FVC of temporal record, the FVC decay rate and the FVC integral over the decay period. We investigate the relevance of these metrics for large scale ecohydrological studies by assessing their co-variation with soil moisture, and with topographic, soil, and vegetation factors. Consistent with our initial hypothesis, FVC minimum and maximum increase with soil moisture, while the FVC integral and decay rate peak at intermediate soil moisture. We find evidence for the relevance of topographic moisture variations in arid regions, which, counter-intuitively, is detectable in the maximum but not in the minimum FVC. We find no clear evidence for wide-spread occurrence of the “inverse texture effect” on FVC. The FVC integral over the decay period correlates with independent data sets of plant water storage capacity or rooting depth while correlations increase with aridity. In arid regions, the FVC decay rate decreases with canopy height and tree cover fraction as expected for ecosystems with a more conservative water-use strategy. Thus, our observation-based products have large potential for better understanding complex vegetation-water interactions from regional to continental scales.application/pdfenCharacterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary SatellitesKüçük, ÇağlarKoirala, SujanCarvalhais, NunoMiralles, Diego G.Reichstein, MarkusJung, MartinCENSE - Centro de Investigação em Ambiente e SustentabilidadeDCEA - Departamento de Ciências e Engenharia do AmbienteJohn Wiley and Sons Inc.HostingInstitutionOrganizationalRUNe-mailmailto:run@unl.ptrun@unl.ptISSNIsPartOf1942-2466URNIsPartOfPURE: 46293159URNIsPartOfPURE UUID: 1798b0f2-b42a-4e1b-947a-357bfa55ce79URNIsPartOfScopus: 85125565058URNIsPartOfWOS: 000776466100008URNIsPartOfPubMed: 35865621URNIsPartOfPubMedCentral: PMC9286687DOIIsPartOf10.1029/2021MS0027302022-10-05T22:16:00Z2022-032022-03-01T00:00:00ZHandlehttp://hdl.handle.net/10362/144486http://purl.org/coar/access_right/c_abf2open accessAfricaecohydrologyfractional vegetation covergeostationarywater limitationGlobal and Planetary ChangeEnvironmental ChemistryGeneral Earth and Planetary Sciences5796615 bytesEuropean CommissionDo droughts self-propagate and self-intensify?H2020Crossref Funder IDhttp://doi.org/10.13039/501100008530literaturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://run.unl.pt/bitstreams/0548cd37-6791-405a-9b7a-059870f25d5a/download |
| spellingShingle | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites Küçük, Çağlar Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| status | SINGLETON |
| subject.fl_str_mv | Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| title | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| title_full | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| title_fullStr | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| title_full_unstemmed | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| title_short | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| title_sort | Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites |
| topic | Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| topic_facet | Africa ecohydrology fractional vegetation cover geostationary water limitation Global and Planetary Change Environmental Chemistry General Earth and Planetary Sciences |
| url | http://hdl.handle.net/10362/144486 |
| visible | 1 |